Disclosure threats: Huang et al. explored threats related to
the disclosure of PHI, including data at rest and data in
transit. There are four fundamental challenges in secure
transmission. First, the adversary may inspect the wireless
network packets and obtain sensitive medical data; Second,
even if the wireless network traffic is encrypted, in some settings it is possible for a clever adversary to use traffic
analysis to determine characteristics of the traffic. Third,
the adversary may use physical layer or link layer
fingerprinting methods to identify the device type. Fourth,
because the wireless medium is open, an active adversary
may inject frames or may selectively interfere with wireless
frames.